Processing And Tribological Properties Of Si3N4/Carbon Short Fibre Composites

Si3N4/carbon fibre composites were fabricated using several types of fibre. All the composites had higher fracture toughness compared with monolithic Si3N4 ceramics. Tribological properties were investigated by a ball-on-disk method under unlubricated conditions. The composite containing fibres with a high orientation of graphite layers and high graphite content indicated a low friction coefficient. It was identified, by Raman spectroscopy, that graphite was transferred from the composite to the Si3N4 ball of the counter body during the wear test.